Rename JS_CURRENT_ISOLATE to JS_CURRENT_ISOLATE_CONTEXT.

dart/sdk/lib/_internal/compiler/implementation/compiler.dart

Index: dart/sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
index f14543f3dcae2b23c108967dfbc57f81277b579e..d6aff59f2ec5fd15d3bd9f5d5e1bad046f02fae1 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -286,6 +286,12 @@ abstract class Compiler implements DiagnosticListener {
    */
   final Uri sourceMapUri;
 
+  /**
+   * The name to use for the global JS object in JS output.  Default
+   * value is "$".
+   */
+  final String globalJsName;
+
   final api.CompilerOutputProvider outputProvider;
 
   bool disableInlining = false;
@@ -460,6 +466,7 @@ abstract class Compiler implements DiagnosticListener {
             this.verbose: false,
             this.sourceMapUri: null,
             this.buildId: "build number could not be determined",
+            this.globalJsName: r'$',
             outputProvider,
             List<String> strips: const []})
       : this.analyzeOnly = analyzeOnly || analyzeSignaturesOnly,